6.3.7 Packet Tracer – Configure and Verify NTP Answers

6.3.7 Packet Tracer – Configure and Verify NTP Answers

 Addressing Table

Device Interface IP Address Subnet Mask Default Gateway Switch Port
R1 G0/0/0 10.1.1.1 255.255.255.252 N/A N/A
G0/0/1 192.168.1.1 255.255.255.0 N/A S1 F0/5
R2 G0/0/0 10.1.1.2 255.255.255.252 N/A N/A
G0/0/1 10.2.2.2 255.255.255.252 N/A N/A
R3 G0/0/0 10.2.2.1 255.255.255.252 N/A N/A
G0/0/1 192.168.3.1 255.255.255.0 N/A S3 F0/5
PC-A NIC 192.168.1.5 255.255.255.0 192.168.1.1 S1 F0/6
PC-B NIC 192.168.1.6 255.255.255.0 192.168.1.1 S2 F0/18
PC-C NIC 192.168.3.5 255.255.255.0 192.168.3.1 S3 F0/18

Objectives

  • Configure OSPF MD5 authentication.

Background / Scenario

In this activity, you will configure OSPF MD5 authentication for secure routing updates.

Instructions

Part 1: Configure OSPF MD5 Authentication

Step 1: Test connectivity. All devices should be able to ping all other IP addresses.
Step 2: Configure OSPF MD5 authentication for all the routers in area 0.

Configure OSPF MD5 authentication for all the routers in area 0.

R1(config)# router ospf 1
R1(config-router)# area 0 authentication message-digest
Step 3: Configure the MD5 key for all the routers in area 0.

Configure an MD5 key on the GigabitEthernet interfaces on R1, R2 and R3. Use the password MD5pa55 for key 1.

R1(config)# interface g0/0/0
R1(config-if)# ip ospf message-digest-key 1 md5 MD5pa55
Step 4: Verify configurations.

a. Verify the MD5 authentication configurations using the commands show ip ospf interface.

b. Verify end-to-end connectivity.

Download 6.3.7 Packet Tracer – Configure and Verify NTP PDF & PKA files:


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